The officially required version of Solaris 10 8/11 (U10) or 10 1/13 (U9). We officially certify JDK 7 and JDK 8 on 10 9/10 (U9). So we may need to upgrade our build platform while continuing to build against older versions of the run-time libraries. (Not sure how to do that yet.)

It is not clear yet why we are not seeing this issue on the SPARC JPRT build attempts.